It may be 30 miles outside Glasgow, but a train station at the airport and half price rail fares for Prestwick passengers make for a warm welcome, I think - not to mention the wonderful beach view as you land.
Instead of e-mailing, best bet is to pop into the airport and ask, unless you live quite far away. Give them a ring if this is the case (anyone would do within the airport as they're sure to hear the piper playing!!!)
Thanks. I'm not near enough to pop in, but I got an email back from the airport. They said they often bring in a piper to welcome the foreign visitors off an inaugural flight when a new service has started. They think he charges �75.